Improvement in machines for polishing wood



UNITED STATES 'PATENT @Prion JOHN O. FISH, OF GENESEO, NEW YORK.

IMPROVEMENT IN MACHINES FOR POLISHING WOOD.

Specification forming part of Letters Patent No. 148,437, dated March10, 1874; application filed March 5, 1874.

To all whom it may concern:

Be it known that I, JOHN O. FISH, of Geneseo, in the county ofLivingston and State of New York, have invented certain Improvements inMachines for Polishing Vood, of which the following is a specification:

My invention consists in combining certain feeding devices with abelting-machine to render' it automatic, as hereinafter more particularly specified and claimed.

1In the drawings, Figure l is a top view. Fig. 2 is a longitudinalsection. Fig. 3 is a side elevation of the feeding devices detached.

I make a frame, A, to carry the machinery, of any suitable shape, suchas shown in Figs. 1 and 2. The belting device, consisting of a sandedbelt, B., and pulleys O and C', is old, and heretofore, in machines ofthis character, the articles to be polished are held and operated by thehands of the operator. My invention consists in adding certain devicesthat render the operation automatic, and give the piece of wood thenecessary movements as it passes over the belt B to polishit. The pulleyC is on a shaft, D, that runs in boxes iixed to the frame A, so that theshaft has only a rotary motion. The pulley lC is ou a shaft, D that runsin boxes bolted to a sliding frame, E. The frameE is held in place byguides or slides F, and is drawn toward the rear of the machine byweights G. These weights keep the belt B stretched, and, at the sametime, if any unusual strain comes upon the belt, allow the frame E toyield to such strain and relieve the belt. The sanded belt B runs over apulley, H, Fig. 2, which latter, as well as pulleys 'C C, has a roundedface, so that the center of the belt will be higher than the edges. Tothe frame A bevel-wheel c is rigidly attached, having a hole through itscenter to admit the projecting hub ofthe spur-wheel b, which extendsthrough the frame, as shown at c, Fig. 1. On the end of this hub awasher is xed by a set-screw, that holds it in place. The hub of wheel bis also hollow to allow the pieces to be polished to pass through overthe belt B. The wheel b is formed of a rim and an open cross-bar, e,which latter is so arranged as to admit beveled wheels (l and d betweenit andthe rim, as shown in the drawing. The wheels d d' are fixed onshafts having the bearings of one end in the cross-bar e,

(extending through the sides of the crossbar,) on which are Xedspur-wheels ff', and their other ends are journaled in a projection onthe side of the rim of the wheel b. The wheels d d mesh into wheel a,and get a planetary movement from the motion of the wheel b as theyrevolve around wheel a. These spur-wheels f and f mesh with and give arotary motion to spur-wheels h h', Figs. 2 and 3. The wheels h h are onshafts in the open part of cross-bar c, having their bearing in itssides, as shown. g g are feed-rollers on these shafts, made of rubber,so as to allow for differences in size ofthe articles to be fed to thepolishing-belt. This I feeding device is placed on the inside of theframe and duplicated, one being placed directly opposite the other, sothat the pieces will pass through the one into the other, one having amotion that will push the piece over the belt B, and the other receivingand drawing it through until it passes out at the other side. Thespurwheel b receives motion from a wheel, J, on shaft K, which is placedon top of the frame A. On the end of shaft K a pulley, L, is placed,which is driven by a belt on shaft D. To the frame A there are attachedprojecting pieces P, Fig. 1, and below them others, R, partially shownin Fig. 2, which carry upright shafts S. On the upper end of the shaftsS are conical rubber pulleys c. The shafts are driven by belts runningaround pulley m on shaft y, which latter is sustained in the same manneras are shafts S. The shaft y is driven by a belt running from shaft D.There are two sets of conical feed-rollers. Those represented by lettersc lv on one side of the frame feed the pieces into feed-rollers g g',and through them to rollers o o on the other side, which draw them away.To a cross-bar, G', placed on top of the frame A, there are attached twoprojecting arms, wf, one on each side of the belt B. On the outer endsof these arms projections are formed, either of metal or wood, (shown inFig. 2 at y,) which are concaved at the bottom to receive and guide andpress the pieces to be polished'on the belt B.

The operation is as follows: The piece of wood to be polished is laid inbetween thefeed-rollers lv, and carried by them through the hub ofspurwheel b until it enters between the feed-rollers g g', as shown indotted lines in Figs. 2 and 3. These, being of rubber, press it so thatit will not rotate between them. At the same time the rollers g g',rotating ou their axes, feed the piece along over the belt B, andrevolving around one anotheron account of the planetary motion of wheelsd lL-give a rotary motion, as Well as an end movement, to the piece tobe polished, and presentsall the parts to the sanded sheet. When thepiece has passed to the opposite feed-rollers g and g, they receive itand dranT it along, at the same time give it all the movements impartedby the other rollers, and pass it to the other conical rollers o' o. Thesanded belt is caused to run at a high rate of speed, and as the pieceof Wood passes over it, it is polished. rlhe pulley H, having a roundedperiphery, and being under the belt near Where the piece to be polishedpasses over, raises the center of the belt, and prevents the piece ofWood from passing under, and, at the same time, presses the belt againstthe Wood to be polished.

mechanism, constructed and arranged as herein described.

4. The pulley H and provil eeting guiding-arms m', in combination withbelt B, when eo11 structed and operating as and for the purpose setforth.

Jeun e. lust-1.

Witnesses:

Jus. LORENZO GAGE, XVM. A. BRODIE.

